Lamp chimney or globe.



E. G. JOHANSON.

LAMP CHIMNEY OR GLOBE.

APPLICATION FILED DEG.16, 1910.

2 SHEETS-SHEET 1.

INVENTOI? AURA/EV 2 1 9 1 Kd 2 6 n H J d m n .w a P WITNESSES.

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Patented June 25, 1912.

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. UNITED sTATEsPATENT oFFi' oE.

EMIL GOTTFRIED JoHANso'N, OF CHICAGO, 'ILLINo Is, ASSIGNOR T JOHN mn'nmmvson,

or CHICAGO, IL INOIS.

LAMP CHIMNEY 0R GLOBE.

Specification of- Letters Patent. Patented Julie 25; 1912;

- Application filed December 16, .1910. Serial No. 597,676. 1

To all 'whom "it may concern:

Be it known that I, EMIL Go'rrrnrnn JOHA'NSON, a citizen of the United States,

and a resident of Chicago, in the county of Cook and State of Illinois, have invented. certain new and useful Improvements in Lamp Chimneys or Globes, of which the i following is a'specificatiom.

My present invention-relates to the chimarticle of the class referred to which will both enlarge the apparent size of the fla'me form of chimney or globe which will more uniformly enlarge the apparent size of the flame and more evenly difluse the light rays of such flame, than others known to me, and

' thereby give the appearance ofa substantially continuous flame .of the size of the chimney, without showing the outline of the wick, filament or' carbon rods contained therein, and compensate as far as possible for any inequalities in such light due to 'fiickering on account of unevenness in the surface of the wick, difference in the potential of the current, or impurities'in the carbon points of-the are used therein;,the provision of an improved arrangement of lenses. on such chimney 'whereby the tendency thereof to fracture upon expansion is largely overcome; the provision of an im.-

proved arrangement of lenses whereby substantially no undifl'used rays may pass through the chimney, together with such further objects as may hereinafter appear.

I am aware that it has been heretofore proposedto form chimneysca-rrying thereupon a plurality of lenses; chimneys provided with corrugated portions to allow for expansion, and chimneys provided with two a series of corrugations, one arranged at an angle to the other, but none of these conneys of lamps, aid the globes or shades" which are used for protecting the flame. of .or directing light derived from lamps, and contemplates the provision of an improved structions give the magnified flame appear- I ance ofthe light which is the principal object sought by me.

Inobtaining the objects above stated I section, of a-lamp chimney embodying my improvements; Fig. 2 is an enlarged sect ional view" of the chimney of Fig. 1; Fig. 3 is an elevational view, partly in section, of a lamp globe embodying my improvements; and, Fig. 4 is a diagrammatic view, illustrative of the relation of the several lenses on one surface of'thechimney or globe to those fications of the upper'portion ll-with an electricv arc-lamp. It will be observed that u on the outer surface 12 of such chimney Ihave arrangeda'number of bulls-eye lenses 13., preferably convex, and on the inner surface 14 thereof, lenses 15, of somewhatsmaller diameter to the end that I may attain a relation between such lenses to be belowdescribed.

Referring now more particularly to Fig. 3, it will be observed that I have here shown my improvements as applied to a globe such as is available for use with electric light bulbs containing an incandescent filament, or with inverted gas flames acting upon incandescent candles; It should be understood that the general arrangement of the lensesl? and 15 is similar to that'of Fig.

1, save that the size of the lenses decreases from the largest diameter on such globe proportionately to the decrease in diameter of such globe.

Referring now more particularly to Fig. 4, it should be understood that I have here illustrated my preferred form of arrangement of-the several series of lenses. The greatest amount of diffusion is attained with accompanying drawings the least number of lenses, as here shown as follows: The lenses 13 are arranged in horizon'tal rows 17, 18 and 19, having the axes of each row of lenses in the same horizontal plane, and the axial planes of the several 'rows parallel, in'such a manner that the lenses of each vertical row 20, 21 and 22 also have their axes. in the same vertical plane and such several planes are substantially at right angles to the planes of the rows 17, 1.8 and 19. Light which'would otherwise pass uninterruptedly through the interstices 16 between the several lenses on the outer surface, is interrupted and diffused by means of the arrangement of lenses 15 on the inner surface of the chimney or globe, which are similarly arranged to those of the lenses 13, as indicated in dotted lines in Fig. 4, and so positioned-that the center of each lens 15 is substantially the center. of each interstice 16, and vice-versa. It will thus be observed that substantially no ray of light may pass through the chimney or diffusion globe without being subject to one of the lenses 13' or 15, and that thus a maximum and appearance of solid flame is attained. On viewing Fig. 2 it will be seen that there is a substantial corrugation of all that part of the chimney adjacent to the flame, save the lines of nearest approach between the vertical rows indicatedat 23 and 24 and the horizontal rows indicated at 25 and 26, on both sides of the chimney, and that even at such. points as at 27 (Fig. 3) there is a corrugation on one surface of'the chimney allowing for a reasonable degree of expansion, and .the consequential danger offracture, either from expansion or shock, is largely avoided, 1 V

Having thus described my invention and illustrated its use, what I claim as new and desire to secureby Letters Patent is the fol-. lowing: r p

1. Alight refractor o'r diffuser having a plurality of rows of lenses on the outer and inner surfaces thereof, the. lenses of one row of the outer surface being arranged on a common axial plane and the lenses of another row being arranged on a common axial plane at anangle to the first mentioned axial plane, and the lenses on the inner surface being smaller than those of. the. outer surface, similarly arranged, and positioned to completely cover the interstitial spaces between the lenses on'the outer surface, whereby a common relative-relation of the lenses onione surface tothose of the other surface is maintain and thereby all light passing through the portion of the inclosure having lenses applied thereto is equally diffused by lenses throughout all parts of such portion.

2, A light refractor or diffuser having .lenses arranged on both the inner and outer one surface of the chimney being arranged off-center relatively) to the centers of the lenses on the other surface thereof, and but partly over such lenses.

4- A light refractor or diffuser having lenses arranged on both the inner and outer surfaces thereof, the axial planes of the lenses of one surface thereof being arranged substantially opposite the centers of the interstitial spaces on the other surface.

lenses arranged on both the inner and outer lenses of the-other side thereof, whereby such 5. A light refractor or diffuser having surfaces thereof, the lenses of one surface being arranged approximately adjacent the centers of the interstitial spacesbetween the interstitial spaces are completely covered.

6. A light refractor ordifi'user provided with a lurality of vertical and horizontal series 0 rows of lenses on the outer and inner surfaces thereof, the lenses of the opposing surfaces being out of axial alinement, the lenses of one surface being of a different size from the-lenses of the other surface. v

7 A light refractor or diffuser having a surface provided with substantially contiguous lenses arranged in rows, each row includinga plurality of lenses with the axes of each row in the same horizontal plane and the axial planes of the several rows parallel and the lenses .of each vertical row having their axes in the'same vertical plane with said planes substantially at right angles to the planes of the horizontal rows.

8. A light refractorv or diffuser having a plurality of rows of lenses on the outerand inner surfaces thereof the lenses "of one row be1ng arranged on a common axial plane and;

the lensesof another row being arranged on a common axial plane at an angle to the first mentioned axial plane. Y

9. A light refractor or diffuser having a plurality of rowspf lenses on the outer and mentioned axial inner. surfaces thereof, the lenses of one row being arran ed on a common axlal plane and the lenses o another row being arranged on 'a common axial plane at an'angle to the first 7 lane 'on one side of the chimney, and the enses on the other side being similarly arrahged and positionedover the interstitial spaces between the lenses on the opposite side of the chimne 10. A light, refractor or diffuser having lenses arranged in, a plurality of series of rows on both the inner and outer surfaces thereof, the rows of each series on one surface being arranged' at an angle to those of p each series on the other surfaceand projectform on both the outer and inner surfaces 2mg into the interstitial spaces therebetween. thereof, the lenses of the outer surface being 11. A li%ht refractor or difiuser having larlger than the lenses of the inner surface.

substantial contiguous lenses of substantestimony whereof I have hereunto 5 tially like orm arranged in a .plurality of si ed my name in the presence of the two 15 series of vertical and horizontal rows on sui scribed witnesses. both the inner and outer surfaces thereof. EMIL GOTTFRIED J OHANSON.

12. A light refractor or difiuser provided Witnesses: with a plurality of series of rowsof substan- PAUL CARPENTER,

10 tially contiguous lenses of substantially like E. G. NAYLOR. 

